Oven doors



G. W. KLEFZIG July s, 1969 OVEN DOORS Filed March 4, 1968 rrTUwim UU HI Fig, 4/ .Q55 3;

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ATTORNEYS United States Patent Office 3,453,997 Patented July 8, 1969 3,453,997 OVEN DOORS Glen W. Klepzig, Abbeville, Miss., assignor to Chambers Corporation, Cleburne, Tex. Filed Mar. 4, 1968, Ser. No. 709,978 Int. Cl. F23m 7/00 U.S. Cl. 126-198 2 Claims ABSTRACT OF THE DISCLOSURE Structure and arrangement to provide improved cooling effect for front panel region of an oven door to be utilized with a cooking oven. Particularly desirable when the door front panel region incorporates decorative material that can be damaged by temperatures normally utilized with cooking ovens.

Background of the invention There is a need for improvement in cooking oven ydoo-r structures of the type wherein it is desirable to minimize heat at the front surface region thereof. The present invention concerns'achievement of such improvement.

Brief description '0f drawing FIG. 1 is a front elevational view of a cooking oven door in accordance -with a preferred embodiment f the invention; FIG. 2 is a vertical sectional view taken at lines II-II of FIG. 1; FIG. 3 is a horizontal sectional view taken at lines III-III of FIG. 1; FIG. 4 is a side elevational View of the door of IFIG. Il; and FIG. 5 is a top plan view of the door of FIG. 1.

Description of preferred embodiment In FIG. 1 of the drawing there is shown a front elevational view of a typical cooking oven door 11 which utilizes the present invention in accordance with a preferred embodiment thereof. The door 11 includes a front panel 13, a baille plate 15, an insulation retainer 17, a door liner 19, front panel trim 21 and door edging 23.

In the embodiment shown, the front panel 13 is made up of a panel member 25 and a panel member retainer 27. The panel member 25 is a sheet of decorative wood.

The peripheral outlines, in the front elevational aspect, for the panel member retainer 27, the baille plate 15, the insulation retainer 17, and the door liner 19, are all essentially the same, being substantially the rectangular shape of the door 11 as shown by FIG. l. The door liner 19 is made of metal sheet material and has the usual inwardly extending rectangular depression portion 29. The outer peripheral portion of the door liner '19 is provided an outwardly extending ilange portion 31.

The insulation retainer 17 is made of metal sheet material and is provided at its outer margin with edge surfaces in the form of an inwardly extending ilange portion 33. The inwardly extending ilange portion 33 of the insulation retainer mates with the outwardly extending ilange portion 31 of the door liner 19, so that the `door liner 19 and insulation retainer 17 together provide a closed spaced within which the usual insulation material 35 may be disposed.

The panel member retainer 27 is made of metal sheet material in the form of a shallow pan which is shaped to receive the panel member 25.

The baille plate 15 is made of metal sheet material which is substantially planar except that the side margin portions 37 may be turned inwardly as shown by FIG. 3.

The panel member retainer 25, the baille plate 15, and the insulation retainer 17 are supported in juxtaposed spaced relation by conventional well known means, including spacers 39, with vthe baille plate interposed between the panel member retainer 27 and the insulation retainer 17.

The door edging 23 is a strip of metal sheet material which'borders the outer margins of the panel member retainer 27, the baille plate 15, and the door liner 19. The door edging 23, as the name implies, provides top, bottom, and side edge portions 42, 43, 45 for the oven door 11. The door edging 23 is `ixed to the door liner outwardly extending ilange portion 31 by spot welding.

The panel trim 21 is integral with the -door edging 23 and forms a front decorative border for the oven door 11, aslwell as a part of the front panel retaining means.

The portion of the door edging 23 which borders the space .between the panel member retainer 27 and the baille plate 15 is provided a plurality of top and bottom openings 47, 49, as indicated by FIGS. 2 and 5, and is also provided a plurality of side openings 51 as indicated by FIGS. 3 and 4. The portion of the door edging 23 that borders the space between the baille plate 15 and the insulation retainer 17 is provided a plurality of top and bottom openings 53, 55, as indicated by FIGS. 2. and 5. The space between the baille plate 15 and the insulation retainer 17 is closed on all sides, but has top and bottom openings, so as to resemble a ilue.

The outer face 57 of the insulation retainer is provided a recessed portion 59 as shown by FIGS. 2 and 3. This recessed portion provides an increased volume for the centralregion of the space between the baille plate 15 and the insulation retainer 17. This increased volume region forms a sump, so that air drawn in through the bottom openings 55 will tend to expand as it reaches the sump portion, and this expanding air will force air out through the top openings 53, thus increasing the air movement. The eiiect of this increase in air movement is to cause a substantial decrease in the temperature at the oven door front panel region.

It is preferable that the insulation retainer recessed portion should make up a major portion of the insulation retainer outer face area. The insulation retainer recessed portion may be bordered on all sides by a non-recessed portion, as shown by FIGS. 2 and 3. -If desired, the nonrecessed portions at the sides of the insulation retainer recessed portion may be omitted.

I have found in practice that a spacing of one-fourth inch between the front panel inner face 61 and the baille plate 15, and a spacing of one-fourth inch between the baille plate '15 and the non-recessed portion of the insulation retainer 17, and a depth of ive-sixteenths inch for the recessed portion 57 of the insulation retainer 17, is satisfactory.

It should be apparent from the foregoing that by the provision of the sump in a llue-like opening or space between the insulation retainer and baille plate in an oven door of the general type herein shown and described, a significantly improved cooling eiect for the door front panel region is achieved.

The foregoing disclosure and the showings made in the drawings are merely illustrative of the principles of this invention and are not to be interpreted in a limiting sense.

I claim:

1. In a cooking oven door of a type comprising an insulation retainer having an inner face, edge surfaces and an outer face; a front panel having an inner face disposed in juxtaposed spaced relation to said retainer outer face; a baille plate disposed intermediate said front panel inner face and said insulation retainer outer face; and means providing air circulation in the space between said front panel and said baflle plate; that improvement wherein there is incorporated: means providing closures at the sides of the space between siad balie plate and said insulation retainer outer face; means providing openings at the top and bottom of said last mentioned space; and means providing a recessed portion for-said insulation retainer outer face, whereby air entering the bottom of said last mentioned space is subjected to a draw action.

2. The cooking oven door as defined by claim 1, wherein said recessed portion makes up a major portion of the said outer face area and is bordered at least at top and bottom by a non-recessed portion.

References Cited UNITED STATES PATENTS 2,438,035 3/1948 Buhman et al. 126- 198 XR 2,889,825 `6/1959 Evans 126-198 3,024,074 3/1962 Jacobs et al. 126--198 XR 10 KENNETH W. SPRAGUE, Primary Exammer. 

